• Title/Summary/Keyword: 적층형

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Study of monolithic 3D integrated-circuit consisting of tunneling field-effect transistors (터널링 전계효과 트랜지스터로 구성된 3차원 적층형 집적회로에 대한 연구)

  • Yu, Yun Seop
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.26 no.5
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    • pp.682-687
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    • 2022

  • In this paper, the research results on monolithic three-dimensional integrated-circuit (M3DICs) stacked with tunneling field effect transistors (TFETs) are introduced. Unlike metal-oxide-semiconductor field-effect transistors (MOSFETs), TFETs are designed differently from the layout of symmetrical MOSFETs because the source and drain of TFET are asymmetrical. Various monolithic 3D inverter (M3D-INV) structures and layouts are possible due to the asymmetric structure, and among them, a simple inverter structure with the minimum metal layer is proposed. Using the proposed M3D-INV, this M3D logic gates such as NAND and NOR gates by sequentially stacking TFETs are proposed, respectively. The simulation results of voltage transfer characteristics of the proposed M3D logic gates are investigated using mixed-mode simulator of technology computer aided design (TCAD), and the operation of each logic circuit is verified. The cell area for each M3D logic gate is reduced by about 50% compared to one for the two-dimensional planar logic gates.

  • https://doi.org/10.6109/jkiice.2022.26.5.682 인용 PDF KSCI

A Study on the Evaluation of the Failure for Carbody Structures made of Laminated Fiber-Reinforced Composite Materials Using Total Laminate Approach (전체 적층판 접근법을 이용한 섬유강화 적층 복합재 차체 구조물의 파손평가 연구)

  • 신광복;구동회
    • Composites Research
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    • v.17 no.1
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    • pp.18-28
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    • 2004

  • In order to evaluate the strength of carbody structures of railway rolling stock made of laminated fiber-reinforced composite materials, total laminate approach was introduced. Structural analyses were conducted to check the basic design of hybrid composite carbody structures of the Korean Tilting Train eXpress(TTX) with the service speed of 180km/h. The mechanical tests were also conducted to obtain strengths of composite laminates. The results show that all stress components of composite carbody structures are inside of failure envelopes and total laminate approach is recommended to predict the failure of hybrid composite carbody structures at the stage of the basic design.

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Finite Element Analysis of Large Deformation of Fiber Metal Laminates Under Bending for Stress-Strain Prediction (굽힘하중을 받는 섬유 금속 적층판의 응력-변형률 예측을 위한 대변형 유한요소해석)

  • Yeom, Kyung Mi;Lee, Jongsoo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.39 no.10
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    • pp.963-970
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    • 2015

  • Laminate structures are used in the automobile, aerospace, and display industries. The advantages of fiber metal laminates are well known. Fiber metal laminates are useful for reducing the weight and improving impact resistance . However, currently, the mechanical properties of fiber metal laminates are not derived. In this paper, we use thickness as a factor for comparing the properties of laminates of various thickness combinations. The properties fiber metal laminates are analyzed using design of experiments. In addition, the finite element method is used to analyze elastic and plastic strains of fiber metal laminates and aluminum plates. The final goal of this paper is to find a suitable finite element model of fiber metal laminates under bending.

  • https://doi.org/10.3795/KSME-A.2015.39.10.963 인용 PDF KSCI